Firearm of the repearter gun type



Jan. l1, 1955 M. MAERK FIREARM OF' THE REPEATER GUN TYPE Filed April 28. 1948 3 Sheets-Sheet 1 Jan. 11, 1955 M. MAERK FIREARM OF THE REPEATER GUN TYPE I5 Sheets-Sheet 2 Filed April 28, 1948 m TM E E u W A M. m mh l n m .wm mh nm l w n E w uw w M -Ehldlur y f, Ew i-- i-- Jan. 1l, 1955 M. MAERK FIREARM OF THE REPEATER GUN TYPE Filed April 28, 1948 3 Sheets-Sheet 3 FIREARM F THE REPEATER GUN TYPE Mikkel Maerk, Lokken Verk, Norway Application April 28, 1948, Serial No. 23,765

Claims pn'ority, application Norway May 13, 1947 7 Claims. (Cl. 42-10) The present invention has for its object a hand-operated re arm of the repeater gun type, having a sliding barrel and in which loading and cocking of the gun is brought about by a movement of the operators hand, causing the barrel to slide forward and backward on the frame of the breech mechanism casing mounted on the gun stock.

An important feature of a repeater gun constructed according to the invention consists in the combination of slidably mounted gun barrel with a breech block slidingly mounted in the rear part of the breech casing of the gun and with its head or fore end movable therein to a limited extent in a longitudinal as well as in a transversal direction in relation to the barrel, into and out of engagement with fastening means in a short rearward barrel extension of a reversedly U-shaped sectional form.

To the breech block are attached fastening means adapted to engage corresponding fastening means on the stationary part of the breech casing, when the breech is closed, the breech block thus functioning as a coupling device to attach the barrel to the gun stock.

In a preferred embodiment of the invention the ring sear of the gun is attached to the slidably mounted breech block member so as to follow the limited forward and backward movement of the same, and so as to render it possible to utilize the backward movement of the breech block to cock the hammer mounted in the stationary part of the breech casing.

In a preferred embodiment of the invention the n'ng sear is pivotally mounted on a slide moveable in the breech casing along a path parallel to the barrel axis, while the breech block member is mounted on the said slide in vertical guides thereon.

A guideway mechanism is provided in the breech casing to cause the breech block head to move along an inclined path upward in the breech casing when driven backward by the gun barrel in the last part of its rearward sliding movement and so as to bring the breech block up into its closing position in the barrel extension, immediately behind the cartridge chamber in the barrel.

A further important feature of a gun constructed according to the invention consists therein that the gun is adapted to be readily divided into two parts of substantially equal length so as to facilitate packing for 'transportation. 'Ihis is rendered possible by the partlcular construction of the breech mechanism according to the invention. The frame of the breech casing for this purpose is preferably constructed with a forward extension forming guide rails for corresponding guide blocks with grooves on the rear end of the barrel. And at the fore end of the said guide rails a releasable stop piece is mounted to limit the forward movement of the barrel, when the parts are united for use, and to permit the barrel being drawn wholly out of engagement with the gu1de rails by changing the position of the said stop piece.

A further characteristic feature of a gun according to the invention consists in an arrangement enabling cartridges to be inserted into a magazine chamber below the gun barrel from a point in front of the magazine chamber. IThis is made possible by constructing the fore end of the gun stock as a separate part fastened to the barrel and made hollow to embrace the fore end of the breech casing frame. To enable cartridges to be 1nserted, an opening is provided in the wall of the hollow fore end stock communicating with a cartridge insertion opening in the wall of the forward extension of the breech casing.

The otherimportantfeatures of the lnvention will ap- 2,699,006! Patented Jan. 11, 1955 pear from the following description of an example of a gun constructed in accordance with the invention.

The invention is applicable in connection with shot guns as well as with rifles, and it is capable of being applied to single as well as to double barrel guns.

The invention is illustrated by way of example in the accompanying drawings which show a single barrel shot gun.

ln the drawing: i

Fig. 1 is a longitudinal vertical section of the gun barrel, and the breech mechanism open.

Fig. 2 is a transverse vertical section of the barrel on the line II-II of Fig. 13.

Fig. 3 is a side elevation of the barrel and breech mechanism closed.

Fig. 4 is a vertical section on line IV-IV of Fig. 3.

Fig. 5 is a front elevation of the breech block.

Fig. 6 is a side elevation of the breech block.

Fig. 7 is an inside view of the right hand cover plate of the breech casing, the breech mechanism being closed.

Fig. 8 is an outside View of the same plate.

Fig. 9 is a side view of a slider on which the breech block is mounted, and which carries also an arresting latch for the cooking mechanism.

Figs. 10 and 11 are side views of the slider and cooperating members of the mechanism.

Fig. 12 is a top plan of the breech casing open.

Fig. 13 is a side elevation of the breech casing open, partlly in section, together with a part of the barrel and stoc F'Fig3 14 is a vertical section on the line XIV-XIV of Fig. 15 is a vertical section on the line XV-XV of Fig. 16.

Fig. 16 is a side elevation, partly in section, of a part of the barrel, stock and breech casing closed.

1.(liig. 17 is a side elevation of an arresting device for the s 1 er.

Fig. 18 is an exploded view of the barrel and the stock with the breech casing.

In the example illustrated in the drawings, A denotes the gun barrel secured to the fore-end stock 36. B denotes the breech casing on the frame of which the gun barrel A is slidably mounted. The casing B is secured to the butt-end stock C in such a manner that also these parts are capable of being readily separated from one another.

In the rear part of the breech casing B, the breech block 2 is slidably mounted. In the foremost part of the breech casing frame there is mounted a movable stop member 33 for limiting the movement of the barrel A in a forward direction when the barrel A is in operative position on the frame.

In the bottom of the fore-end stock 36 there is an opening 55 (Fig. 18) which communicates with an opening 56 in the bottom of the breech casing B in front of the cartridge carrier of the feeding device, when the arrel A is in its rearmost position on the breech casing rame.

The barrel The rear end of the gun barrel A has a short rearward extension 1 of a reversedly U-shaped (or vault-like) sectional form. The interior of this barrel extension is provided with three grooves 3a, 3a and 4a to receive lugs 3, 3 and 4 on the breech block head 2 (Figs. 4 and 5). A longitudinal slot 28a in the barrel and barrel extension 1 is provided to receive the cartridge extractor 28 on the breech block slide (Fig. 1).

The barrel extension 1 is slidably mounted on guide rails 53 on the top of the trough-shaped fore part of the breech casing B. The rails slide in longitudinal guiding grooves on the inside Walls of the barrel extension as shown in Figs. 1, 4 and 14.

Breech block mechanism The breech block head 2 has a boring for the tiring pin 5 (Figs. 5 and 6) and has two lugs 3, 3 at the bottom and one lug 4 at the top to iit into corresponding grooves 3a, 3a and 4a in the barrel extension 1.

The tail or rear end part of the breech block member is provided with a forwardly and downwardly inclined slot 8 having at its lower and foremost end a short horizontal part. A guide pin 8a mounted on the Vwall of the breech casing projects into this slot, so that When the breech block is moved forwards, it will be raised to a sufficient extent to enable the lugs 3, 3 and 4 to enter into the corresponding grooves 3a, 3a and 4a in the barrel extension 1, when the barrel is in the closing position.

The breech block tail has a guide pin 9 adapted Vto engage an inclined slot or groove 9a in the wall of the breech casing (Figs. 3 and 6). This groove corresponds in form and length to slot 8 in the breech block tail. By

this arrangement a steady movement of the breech block in the breech casing is ensured.

The breech block member is attached to a slide 7 (Fig. 9) movable in guides in the breech casing along a rectilinear path, parallel to the barrel axis. The `slide is guided by means of a longitudinal guiding groove (not shown in the drawing) in the right hand inside wall of the-breech casing. The slide 7 has a horizontal slot 7g (Fig. 9) for passage of the pin 8a through the slide 7. The breech block member is movable in a vertical path on the slide 7. For this purpose the slide is constructed with a vertical guide block or rib 10 adapted to engage and to slide in a vertical slot 10a lin the breech block member adjacent to the breech block head 2 (Figs. 6 and 9). This arrangement ensures that the breech block head will move parallel to itself, when drivenfforward and backward together with the barrel.

Cooking mechanism The firing sear member 11 y'is pivoted to the slide '-7 at 11C and is actuated by a spring (not .shown in the drawing) having the tendency to press the scar member 11 downward.

The hook or latch 11a (Figs. 9 and 10) is adapted to engage a corresponding notch 12b in the hammer 12. The sear member is constructed with a notch 11b to engage a llug 18 on the wall of the breech casing 6 and with a nose 11x at its end to engage a lug 20h on a safety latch 20, adapted to -be actuated by linger -pressure (Figs. l and 11). On its rear end the slide 7 has a downward lprojection 14, adapted to engage the one (right hand) arm of a lever 15 pivoted at 17 (Fig. 10). The other (left hand) arm of this lever 15 engages a notch 12a on the side face of the hammer 12. This lever 'functions as barring latch for the slide 7 to releaseably hold same in its rearmost position (Fig. The hammer 12 is pivotally mounted on the same bolt 24 as the trigger 23. The hammer 12 is actuated by the main spring-26, one end of which engages a notch 12C in the hammer (Fig. l0).

When the breech block 2 and slide 7 are driven backward by means of a backward movement of the gun barrel, the latch 11a on the sear member engages the notch 12b in hammer 12 and moves the hammerV backward into cocked position. The one arm of lever engages projection 14 on slide 7 and holds same in its rearmost position. When the trigger 23 is pulled, the arm of the trigger lifts the sear member, and the sear latch 11a leaves notch 12b in the hammer, thereby releasing this latter (Fig. 7).

Cartridge feeding mechanism The breech casing B has a trough-shaped forward eX- tension. In the bottom of the fore part of this troughshaped casing there is an opening 56 for insertion of ycartridges in the magazine. This opening 56 communicates with an opening 55 in the bottom of the hollow fore end stock 36, when the barrel is in its rearmost position so that a cartridge can be inserted.

iIn the rear part and in the bottom of this troughshaped casing extension `a cartridge lifter `30 with spring 29 -is mounted, and at .the -top ofthe side walls of this casing two guide rails 32 are arranged for guiding the cartridges head. The distance between these rails 32 is greater than the diameter of the cartridge shell, but smaller than the diameter of the cartridge head. A hat spring 31 with up-'bent rear end mounted on the bottom of the casing, back of the cartridge lifter 30, serves to prevent an inserted cartridge in the magazine from moving forward during the `forward movement of the barrel (as shown in Fig. l). A bottom piece 25 in the casing, back of the flat spring 31, has a sloping top surface (of 45 angle) to aid in guiding the cartridge in its move- CFI 4 ment -up into its position in line ywith the cartridge chamber in the barrel. for fastening the hammer spring 26. The co-'operation of the operators insertion of the cartridge, and the cartridge feeding mechanism is in short as follows:

When the gun is in its cocked and locked position, the operator inserts a cartridge in the magazine through the openings y55 and l56 .in the Ibottom -of the fore end stock 36 andthe trough-shaped casing B. vThe operator pushes with his finger the cartridge -backward until the itat spring 31 in the magazine snaps behind the collar of the cartridges head. The cartridges head will now be kept down in its original position in the magazine by the two rails 32 on top of the casing, and by the flat spring 31 in the magazine, and `the fore end of the cartridge `will be kept down in position by the rear end of the barrel. When the operator, after firing, moves the Vbarrel forward for a new loading, the rear end of the barrel will leave the fore end of the cartridge and the spring 29 of the cartridge lifter "30 -will push the fore end of 4vthe cartridge up between Ithe guide -rails 32 on top of the casing,l

and into the breech blockchamber in the Ibarrel `extension 1, lwhile at the-rear part the cartridge head is kept down by means of the tw-o guide rails `32 "arranged'on'top' of the trough-shaped part of the breech casing.

Now, when the barrel is `pulled back yinto its 'original cocked position, lthe cartridge is pushed |backwarduntil its head is no longer in Acontact with the guide rails 32, whereby the cartridge Iispositioned Vto Ibe lifted by the cartridge ylifter 30 upwards yinto its position in line Vwithl -It then butts against the breech the ycartridge chamber. 'block 2 and is carried forward and into its chamber 'in the barrel.

Combined take downand sliding barring mechanism Adjacent'to the front end wall 60 of the cartridge vinsertion chamber is pivotally mounted an arresting block 33 (iFig. 15), .adapted to limittheforward movement of the barrel on the breech frame. The -block is made 'of hardpressed Bakelite or similar material to de'aden the shock of `the reciprocating barrel. The 'block 33 has an elongated boring for `its pivot pin 34. This arrangement has the eiect to relieve the pivot 'from the rstress exerted by the moving barrel, the stress :being taken up by I the end wall `60 on which the block 33 will rest. At the end of a lever on block 33 there is a small ng'er `piece 38, 4the end ofwhich is accessible from outside. This nger piece is held between Asprings 35 in such a Way as to permit Vthe block to be held in one or the other'of its extreme positions. as a stop to limit the forward movement of the barrel, as` the Ibarring block 33 with 'its rear end will butt against a notch in Vthe fore end wall 60 ofthe breech casing, while the fore end of -block 33 butts against the right hand `guide block 52 on the approaching barrel extension 1, as indicated in Figs. l, 2, 4, 12, '14 and 15. In the other position, the block 33 is swung down and outof the path of the lguide blocks v52 (Figs. 3 a-nd 18) on the barrel extension 1, so' that vthe barrel can be detached from the breech casing frame.

Operation of -the rcocking mechanism When the lbarrel is moved 'in 1a backward direction and a new `cartridge has entered the cartridge chamber `in the barrel, 'the breech 'block head y2 has also been brought into its proper locking position in lthe -barrel'extension 1.'

In the backward .movementof the barrel, the "rear part of `the `guide blocks y52 of the' barrel extension abuts" against the lbreech `block locking latch 13 on the slide 7 (Figs. 8 and 17) and in its further backward movement unlocks the slide 7as well as the breech block. The sear 11 catches with its hook 11d into the notch 12b on the hammer and inthe course of the continuedbac'kward During this Vmovement of the slide 7. The breech lblock Vwill have entered into its chamber in `the barrel extension vertically to thelaXis-of the barrel during this backward movement of the slide This bottom piece 25 also has a slot In the upper position, the block 33 functions on account of the sloping form of the guidesurfaces.V The .whole mechanism yis now in a locked positlon, and the gun is ready for use.

Firing operation When the gun is to be fired, the button 50 on the safety arm 20a (Figs. 7, 12, 13 and 16) is depressed, by the operators hand grip around the stock, whereby the sear 11 will be released from the hook 20 at the same time as the pressure on the trigger is transferred to the sear t11 and lifts it so that notch 111b will catch over projection 18 and arrests the slide in its forward movement While the hook 11a (=Fig. 11) is released from its engagement with the hammer. The hammer now strikes against the ring pin 5 (Figs. 5, 6 and 13). In the course of the movement of the hammer, the barring latch is released from its engagement with the slide 7, which is now kept 'barred only by means of the sear 11 until the pressure of the nger on the trigger ceases. At this moment `the sear 11 by means of a spring is pressed back to its original position, and t-he notch 11b disengages lug 1S, so that the barrel is ready for a new loading manipulation. When the barrel is now again moved forward, the breech 'block head is still in its locked position in its chamber in -the barrel extension, and owing to the horizontal direction of the corresponding part of the guide surfaces of the breech block, the position of the breech block head 2 in its chamber is not altered before the inclined part of the guide surface is reached, but in the course of the continued forward movement of the barrel, the breech block head travels out of its chamber in a direction perpendicular to the barrel axis, and when the recoil lug gets out of the grasp of the ibreech block chamber, it will be in its foremost position in the breech casing. The slide 7 and consequently also the breech block 2 will then be fastened in this position by means of the barring latch 13. This barring latch `13 (Figs. 8 and 17) is pivoted on a pin =19 fastened to the slide 7. The rear arm of this latch 13 is pressed down on lug 13a by a spring (not shown in the drawing), and when the breech block is in its foremost position, the rear of latch 13 will snap down in front of lug `13a on the casing wall 6, arresting the breech block (Figs. 8 and 17). In the course of the further forward movement of the lbarrel the empty cartrlidge is thrown out and the loading operation takes p ace.

When the gun is opened for the purpose of removing cartridges by depressing the button 22, this latter abuts against the barring latch 15 and releases same from its engagement with the projection 14 on the slide 7. The hammer which is now locked in its engagement with the sear latch, pushes the slide and the breech block forward and out of engagement with the walls of the breech block chamber in the barrel extension. When the operator moves the barrel further forward, the extractor will pull the cartridge out of the barrel. The cartridge in the barrel will then be tilted up and can be removed.

The gun in use The illustrated gun is loaded and cocked by moving the barrel by a movement of the operators hand forwards to its foremost position and then backwards to its rearmost position in relation to the butt-end stock. An empty cartridge shell in the cartridge chamber of the barrel is extracted and ejected in the course of this manipulation. The cartridge feeding mechanism of the gun is actuated by the same manipulation.

When the gun is to be used, a cartridge may be inserted by hand directly into the cartridge chamber in the barrel, but the simplest way is to insert a cartridge into the magazine through the opening 55 in the fore-end-stock. By means of depressing the pressure button 22 at the right hand side of the trigger, the barrel is unlocked, and by a movement with the hand the operator slides the barrel forwardly until it abuts against the arresting block 33, provided for this purpose. In the course of this movement of the barrel the breech block travels out of its chamber in the barrel extension and the spring of the cartridge lifter 30 pushes the foremost end of the cartridge up between the guide rails 32 on top of the troughshaped casing into the breech block chamber in the barrel extension, while the rear part of the cartridge, the head, is kept down by means of two guide rails 32 arranged in the magazine on top of the head of the troughshaped rear part of the breech casing (Fig. 1). When the barrel is now pulled back into its original position, the cartridge is pushed backwardly until its head is no longer in contact with the guide rails 32, whereby the cartridge is allowed to be raised by means of the cartridge lifter up into its position in alignment with `the cartridge chamber. It then abuts against the breech block 2 and is carried forward and into its chamber in the barrel. The breech block head 2 is then immediately below its chamber in the barrel extension. In the course of the last part of the backward movement of the barrel the breech block enters vertically up into its chamber in the barrel extension and is locked in the same. The

hammer is cocked and locked. The gun is now ready for a new tiring, and a new cartridge is therefore inserted into the magazine. When the shot has been red, the barrel still remains locked in its rearmost position, until the pressure of the operators finger on the trigger 23 ceases. The barrel will then be unlocked, and the loading manipulation can be repeated by moving the barrel forward, and then back again. In the course of the forward movement of the barrel the breech block 2 descends and leaves the grooves in the barrel extension. At the same time the extractor draws the empty cartridge case out of the cartridge chamber in the barrel, and the front end of the new cartridge in the magazine is swung up and butts against the empty cartridge, so that the latter is thrown out. The operations are then repeated as above explained.

When the operator at the end of a hunting or a shooting exercise desires to assure himself that no cartridges are in the barrel or magazine, he depresses the pressure button 22 at the right hand side of the trigger guard 21. Thereby the barrel is unlocked, because the slide 7 carrying the breech block is released from its engagement with the breech casing. The striking spring 26 of the hammer 12 forces the slide and the breech block forward. When the barrel is moved further forward until it abuts against the arresting block 33, the opening between breech block and barrel extension is suiiiciently large to enable the operator to remove cartridges in the barrel as well as in the magazine.

If it is desirable in order to facilitate transportation to divide the gun into its two principal parts, this is brought about by depressing the pressure button 22 below the right hand side of the trigger guard 21, whereupon the barrel is moved forward until the manipulation stud 38 for the arresting block 33 appears in the opening 55 in the fore-end-stock.

By means of a light pressure on the stud 38 the arresting block slips into the trough-shaped bottom of the casing and releases the barrel from the lock housing and the butt-end-stock.

I claim:

1. In a re arm of the repeater gun type in which loading and cocking are brought about by moving a slidable barrel forwardly to loading position and backwardly to tiring position, the combination of a breech casing; a barrel slidable forwardly and backwardly in said casing and having a cartridge chamber and a second charnber rearwardly of the cartridge chamber, said second chamber being open at the bottom; a breech block slidable forwardly and backwardly in said casing; guiding means on said casing and said block adapted to cause said block to move downwardly and upwardly when said block slides forwardly and backwardly, respectively, said guiding means comprising as co-operating members an inclined cam slot and a pin moving in said slot; and fastening means in said second chamber and on said block; said barrel and said block being so relatively disposed in said casing that said barrel bears against said block, when said barrel slides backwardly, causing said block to slide backwardly and upwardly into said second chamber, to close said cartridge chamber and to be er1- gaged by said fastening means, and that, when said barrel slides forwardly, said fastening means causes said block to slide forwardly and downwardly to open said cartridge chamber and to be released from said fastening means.

2. A gun according to claim 1 having a stop member mounted in said breech casing, to space the front end of said breech block from the rear end of said barrel when said barrel and said block are projected forwardly, suicient to aiford passage for chambering cartridges.

3. A gun according to claim 1 in which said fastening means comprises grooves and projections, the block actuamosA 7 bengprovided exteriorly with said vprojections and said second chamber being provided yinteriorly with said grooves which receive-saidprojections when said block is raised into closing position.

4. .A lgun according to claim 1 .in which said cam slot is .in `the -breech block and has a horizontal portion at the lower end of its inclined portion, land said pin is on the breech casing, to allow horizontal, rearward movement of the breech block, with the barrel, when the block isaraised. K

5. A gun according to claim y1 in which said breech block comprises a head and a rear tail, said cam slot being insaid tail, and said pin being on the breech casing.

6. .A gun according to claim 1 in which said breech block comprises a head and a rear tail, said cam slot being in said tail, and said pin being on the breech casing, and in which a second guiding means is provided for said breech block, comprising an inclined .cam slot in said breech casing, and a pin on said tail moving in said breech casing slot.

7. A gun according to claim l in which said breech block comprises a head and a rear tail, said cam slot being Vin said tail, and said pin being on the breech casing, and in which a second guiding means is provided for :said vbreech block, comprising an inclined carn slot 8 insaid breech casing, and 'a pin'o'nsaid tail imovng in said breech .casingfslo said breech casing. cam slot having a horizontal portion at the upper end of `its inclined portion to allow horizontal rearward movement of the breech block with the barrel when the block is raised.

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